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Finding the Fourth Proportional to 4,915.80, 7,368.90 and 4,397.40

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Solution

The fourth proportional to 4,915.80, 7,368.90 and 4,397.40 is: 6,591.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,915.80 : 7,368.90 = 4,397.40 : x
  2. Step 2: Convert to fraction form
    4,915.80/7,368.90 = 4,397.40/x
  3. Step 3: Cross multiply
    4,915.80x = 7,368.90 × 4,397.40
  4. Step 4: Simplify right side
    4,915.80x = 32,404,000.86
  5. Step 5: Solve for x
    x = 32,404,000.86/4,915.80
  6. Step 6: Final answer
    x = 6,591.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.